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Search for Higgs boson pair production in the bbττ final state in proton-proton collisions at $\sqrt{s}$ = 8 TeV


Abstract

Results are presented from a search for production of Higgs boson pairs (HH) where one boson decays to a pair of b quarks and the other to a $\tau$ lepton pair. This work is based on proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 8  TeV, corresponding to an integrated luminosity of 18.3 $fb^{−1}$. Resonant and nonresonant modes of HH production have been probed and no significant excess relative to the background-only hypotheses has been found in either mode. Upper limits on cross sections of the two HH production modes have been set. The results have been combined with previously published searches at $\sqrt{s}$ = 8 TeV, in decay modes to two photons and two b quarks, as well as to four b quarks, which also show no evidence for a signal. Limits from the combination have been set on resonant HH production by an unknown particle X in the mass range $m_X = 300$ GeV to $m_X = 1000$ GeV. For resonant production of spin 0 (spin 2) particles, the observed 95% CL upper limit is 1.13 pb (1.09 pb) at $m_X = 300$ GeV and to 21 fb (18 fb) at $m_X = 1000$ GeV. For nonresonant HH production, a limit of 43 times the rate predicted by the standard model has been set.

Abstract

Results are presented from a search for production of Higgs boson pairs (HH) where one boson decays to a pair of b quarks and the other to a $\tau$ lepton pair. This work is based on proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 8  TeV, corresponding to an integrated luminosity of 18.3 $fb^{−1}$. Resonant and nonresonant modes of HH production have been probed and no significant excess relative to the background-only hypotheses has been found in either mode. Upper limits on cross sections of the two HH production modes have been set. The results have been combined with previously published searches at $\sqrt{s}$ = 8 TeV, in decay modes to two photons and two b quarks, as well as to four b quarks, which also show no evidence for a signal. Limits from the combination have been set on resonant HH production by an unknown particle X in the mass range $m_X = 300$ GeV to $m_X = 1000$ GeV. For resonant production of spin 0 (spin 2) particles, the observed 95% CL upper limit is 1.13 pb (1.09 pb) at $m_X = 300$ GeV and to 21 fb (18 fb) at $m_X = 1000$ GeV. For nonresonant HH production, a limit of 43 times the rate predicted by the standard model has been set.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2017
Deposited On:08 Feb 2018 16:33
Last Modified:19 Feb 2018 10:46
Publisher:American Physical Society
ISSN:2470-0010
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1103/PhysRevD.96.072004

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